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Pool Construction
CONSTRUCTION 108: Cementitious Pool Finishes

Learning Objectives

  • Discuss plaster, colored plaster, Hydrazzo, PebbleTec, and other aggregate finishes.
  • Define proper installation techniques and details as promulgated by the National Plasterer’s Council.
  • Define proper startup procedures to reduce damage and staining of cementitious pool finishes.
  • Discuss short-term and long-term care considerations.


Many problems with pool finishes originate from errors in water/cement ratios, water addition during installation, improper troweling techniques, and even the final acid wash for exposed aggregate finishes. Other problems arise during the startup where the water quality affects curing and that water quality is changing constantly during the first few months. This module provides students with the insight on exactly what is happening with the finish at each step of the process and how you can control the numerous parameters to avoid problems and achieve success with the finish and your client’s expectations.

Time/ Credits

1:75 hrs


Randy Dukes

Technical Sales Director, CL Industries, Inc. in Orlando, FL
(727) 595-6509

  • Author of Pool Surfaces, Problems, and Solutions, now in its 7th edition
Randy Dukes

Dukes is regarded as one of the foremost authorities in the pool plaster industry relating to deterioration, discoloration, and staining phenomenon that are commonly associated with cement-based pool coatings. He has served as a moderator and keynote speaker for many of the National Plasterers Conventions starting in 1992 and has instructed courses on "The Science of Cementitious Pool Finishes, Startups, and Maintenance." Dukes has spent a considerable amount of time traveling throughout the U.S. researching and identifying pool surface problems and their relationship to application, water chemistry, and chemical abuse.


  • Module of C201